diff --git a/staticlibs/Android.bp b/staticlibs/Android.bp
index 1143e05..f4799f0 100644
--- a/staticlibs/Android.bp
+++ b/staticlibs/Android.bp
@@ -102,9 +102,6 @@
         "net-tests-utils-host-device-common",
         "net-utils-device-common",
     ],
-    kotlincflags: [
-        "-XXLanguage:-GenerateJvmOverloadsAsFinal"
-    ]
 }
 
 filegroup {
diff --git a/staticlibs/devicetests/com/android/testutils/TestableNetworkCallback.kt b/staticlibs/devicetests/com/android/testutils/TestableNetworkCallback.kt
index 959a837..3c038fa 100644
--- a/staticlibs/devicetests/com/android/testutils/TestableNetworkCallback.kt
+++ b/staticlibs/devicetests/com/android/testutils/TestableNetworkCallback.kt
@@ -170,8 +170,11 @@
     }
 
     // Make open for use in ConnectivityServiceTest which is the only one knowing its handlers.
-    @JvmOverloads
-    open fun assertNoCallback(timeoutMs: Long = defaultTimeoutMs) {
+    // TODO : remove the necessity to overload this, remove the open qualifier, and give a
+    // default argument to assertNoCallback instead, possibly with @JvmOverloads if necessary.
+    open fun assertNoCallback() = assertNoCallback(defaultTimeoutMs)
+
+    fun assertNoCallback(timeoutMs: Long) {
         val cb = history.poll(timeoutMs)
         if (null != cb) fail("Expected no callback but got $cb")
     }